> On 29 Mar 2019, at 2:51 pm, Alex Zavatone <z...@mac.com> wrote: > > In all the docs on categories, I seem to have missed what the term for the > text within the parens of a category declaration is called and what function > it serves.
It's the category name. NSObject(Foo) represents "the Foo category on NSObject". As for what function it serves, well, that's a good question. I've never been aware of a runtime method for extracting such information or testing its presence (as one can for protocol conformation, for example). > Also, I seem to remember the esteemed Jens stating that as soon as a category > class is in your project, it applies to all objects instantiated from the > base class Categories are like a benevolent disease: once linked and loaded, they live everywhere. > and we only had to do an import if we wanted to use the category methods in > the debugger. Please correct me if I am wrong here. > > But I found out that that is not true. You have to import the category > header into any classes where you want to take advantage of the category > methods you added to a specific class. These amount to the same thing, which is exposing the symbol names to your interpreter or compiler for your convenient use as a programmer. -ben _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
